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A lGARBR.1 \.K`E. No. 292,429. Patented 3211.22, 1884.

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Wf/zessg. i2?, @y W GEORGE PATENT OFFICE.

M. HATHAVAY, OF NEV YORK, N. Y., ASSIGNOR-F ONE-HALF TO CHARLES O.KEELER, OF SAMEv PLACE.

CAR-BRAKE.`

SPECIFICATION forming part of Letters Patent No. 292,429, dated January22, 18%24,

' Application filed August Sl, 1883. (No modul.) I

Tn all whom it 711,04/ concern:

Be it known that I, GEORGE M. HATHAWAY, a citizen of the United States,residing at New York, in the county of New York and'Sta-te of New York,have invented certain new and useful Improvements in Car-Brakes; and Ido de- Clare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilledin the vart to which itappertains 1o to make and use the same, reference being had to theaccompanyingv drawings, and to the letters and'gures of reference markedthereon, which form a part of this specification.

This invention relatesv to lcertain improvements in brakes forrailroad-cars; and it has for its objects to provide for automaticallybraking the wheels by the momentum of the cars when stopping, forautomatically releasing the brakes when their use is not required,

2O and for backing the cars after or before the ,brakes have beenapplied to arrest their forward movement, as more fully hereinafterspecified. These objects I attain by the means illustrated in theaccompanying drawings, inl 2 5 whichl Figure l represents abottom planview of a portion of a, car, showing my invention attached; Fig. 2, alongitudinal sectional View, Fig. 3, ai sectional view of the mechanism3o mounted on the axle; Fig. 4, a perspective view of the same; Fig. 5,a similar View, showing the pivoted clamps or jaws in an open position;`and Fig. 6, a vertical sectional view of the same, showing the positionof the rollers and cam-recesses.

The letter A indicates one of the trucks of the car,which may be of theordinary or any approved construction, and'mounted upon the axles of thewheels B, as usual.

The letter' C indicates the brake-bar's,\vhich extend transversely underthe car parallel with the transverse beams of the truck, the saidbrake-bars being swung upon hinges D, pivoted to the trucks at E. To thesaid brake-bars are secured the studs F,which are slotted and havefulcrumed to them the levers G, one of which is pivoted at H to thetruck, as shown. rlhe other lever has secured to it one end of a chain,I, the other end of which is attached to a loose collar,K,whicl1 ismounted upon a loose 5o head, L, surrounding the axle of the car. The

that they may b e clamped or tightened theret on, as more fullyhereinaftenapecied, to brake 6o the wheels. The clamps,l at theirforward ends, are embraced bytwopivoted levers,U, one of which ispivoted to the end of a short bar, V, which is adapted to slide in abearing, lV, secured to the bottom of the-car, the said bar beingpressed forward,A normally by means of a spiral spring, X. The said baris'` provided with a screw-nut, w, which may be screwed up against thespring, so as to adjust the tension of the device. The other leverliaspivoted to 7o its end a bar,Y,which extends to near the end of thedraw-head Z, which is arranged to slide in bearings A, secured to thebottom of the car, andv held normallyforward by means of the spiralspring B. The lever is slotted at C', and 7 5 into it sets one end of abent lever,which is fulcrumed at D, the operating end of which extendsabove the platform, so that the forward end of the vslotted lever may beso moved as to throw it into and out of contact with the draw- 8o head,and thus automatically set the brakes or release them, as more fullyhereinafter specified. The head L is provided with aflange, E', whichhas at its periphery a series of in clined recesses, F', in which areset the loose 8 5 rollers G, and which set within the collar K 'in suchmanner as to` permit the collar ,and

head to travel freely and independently in one direction, and clamp whentraveling in the opposite direction.

The letter I indicates a chain connecting one of the levers G with theordinary brake-shaft, K, which extends upward through the platform, andis provided with the usual brakewheel, L. Y

The operation of my invention will be readily understood from the abovedescription, and is as follows: Vhen the train is going forward, thedraw-head is in anormal position; but upon slaekcning or stopping, thedrawheads are forced together, throwing the level' back, closing thejaws or clamps upon the iixed wheel, causing the collar to turn and windup the chain. and thus automatically apply the brakes. rlhe brakes arereleased when the engine is started up, and the pressure 011 thedraw-head removed; or they may be released by throwing back thelever, soas to freeit from contact with the draw-head. Then required tobael;thetrain, the collar turns freely on the head, permitting the axle torevolve freely.

Having thus described myinvention, whatI claim, and desire to secure byLetters Patent, 1s-

1. rl`he combination, with the axle of a car, of a loose head mountedthereon, and provided with pivoted jaws or clamps adapted to enibrace afixed wheel on the axle, and suitable mechanism for operating saidclamps, the head being provided with a collar movable in only onedirection, and connected to the brakebeam levers by means of achain,whereby the brakes may be automatically operated, substantially asspecified.

2. rlhe combination, with the axle of a car, of the loose head, theloose collar mounted thereon, the chain and brake-levers, the pivotedlevers embracing the clamps, forwardlyextending slotted lever, and theoperating-lever and sliding` draw-head, arranged to operatesubstantially in the manner specified.

3. The combination, with the axle of the car and the fixed wheelthereon, of the loose head and the pivoted clamps, the springs by whichthey are pressed apart normally, and the clamping-levers and theiroperating mechanism, the whole arranged and adapted 1o operatesubstantially as set forth.

l. The combination,with the clamp pivoted to'the loose head mounted onthe axle ofthe car, of the pivoted embracing-levers, the springbar towhich one of said levers is secured, the slotted lever pivoted to one ofsaid levers, the operating-lever working in a slot in the same,

and the sliding draw-head adapted to operate the levers to automaticallybrake the wheels, substantially as specified.

5. The combination, with the bar to which one of the clamping-levers isattached, and the clamping-levers, ot' the spiral spring andadjusting-nut, whereby the tension of the spring is regulated,substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE M. HATHAW'AY.

Vitiiesses:

)L XV. XVHBLAN, HY. Banus.

